Good stuff. I always tell my students to reference quotes using APA style, regardless of whether they were firsthand, secondhand, etc. These days with the Internet, you can access just about anything.
My advice:
1. Find the quote on the net.
2. Use APA style to quote a stand-alone document, with no author identified, and no date given.
For example;
Roy Disney quotes. (n.d.). Retrieved August 17, 2008, from http://www.quotesandpoem.com/quotes/...y-disney/81725